This workshop service repair manual covers the Iveco C78 ENS engine, identified by engine code M20.10. This engine is a liquid-cooled diesel unit with a displacement of approximately 7.8 liters, featuring a common rail fuel system and designed to meet the M20.10 emission standard. Iveco engines are known for their robust engineering and reliability, making them a preferred choice for various demanding applications. This comprehensive manual provides detailed A-Z repair and service procedures, offering step-by-step instructions accompanied by illustrations to ensure clarity. It covers essential maintenance aspects such as recommended service intervals and engine oil capacity, though specific values may depend on the engine's application. This resource is designed to assist owners, mechanics, and technicians in effectively maintaining and repairing the Iveco C78 ENS engine, ensuring its optimal performance and longevity.